"t865 BoB " is a formative with a microBUS structure. It is an effective and easy solution for adding GSM/GPRS solutions into your design. It features the Telit GL865-DUAL or UL865-EUR module, a SMA connector for an antenna, a SIM CARD socket. tGSM BoB communicates with the target board microcontroller via microBUS ( Rx, Tx, Rx2, Tx2, RTS, CTS, Reset, GPIOs ). Only for UL865-EUR Module, has USB Port. The Audio Connector is compatible with Iphone, Samsung, HTC headsets. It has two LED diodes for power indicator and status.